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0bb187ca SH |
1 | /* lnstat - Unified linux network statistics |
2 | * | |
3 | * Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org> | |
4 | * | |
5 | * Development of this code was funded by Astaro AG, http://www.astaro.com/ | |
6 | * | |
7 | * Based on original concept and ideas from predecessor rtstat.c: | |
8 | * | |
9 | * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se> | |
10 | * Uppsala University, Sweden | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | */ | |
18 | ||
19 | /* Maximum number of fields that can be displayed */ | |
f493dc30 | 20 | #define MAX_FIELDS 128 |
0bb187ca SH |
21 | |
22 | /* Maximum number of header lines */ | |
3d0b7439 | 23 | #define HDR_LINES 10 |
0bb187ca SH |
24 | |
25 | /* default field width if none specified */ | |
26 | #define FIELD_WIDTH_DEFAULT 8 | |
27 | #define FIELD_WIDTH_MAX 20 | |
28 | ||
29 | #define DEFAULT_INTERVAL 2 | |
30 | ||
31 | #define HDR_LINE_LENGTH (MAX_FIELDS*FIELD_WIDTH_MAX) | |
32 | ||
33 | #include <unistd.h> | |
34 | #include <stdio.h> | |
35 | #include <stdlib.h> | |
36 | #include <string.h> | |
37 | #include <getopt.h> | |
38 | ||
fcc16c22 | 39 | #include <json_writer.h> |
0bb187ca SH |
40 | #include "lnstat.h" |
41 | ||
42 | static struct option opts[] = { | |
43 | { "version", 0, NULL, 'V' }, | |
44 | { "count", 1, NULL, 'c' }, | |
a4f9e8df SH |
45 | { "dump", 0, NULL, 'd' }, |
46 | { "json", 0, NULL, 'j' }, | |
0bb187ca SH |
47 | { "file", 1, NULL, 'f' }, |
48 | { "help", 0, NULL, 'h' }, | |
49 | { "interval", 1, NULL, 'i' }, | |
7e8bd80e | 50 | { "keys", 1, NULL, 'k' }, |
0bb187ca SH |
51 | { "subject", 1, NULL, 's' }, |
52 | { "width", 1, NULL, 'w' }, | |
fcc16c22 | 53 | { "oneline", 0, NULL, 0 }, |
0bb187ca SH |
54 | }; |
55 | ||
56 | static int usage(char *name, int exit_code) | |
57 | { | |
58 | fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION); | |
acd1e437 SH |
59 | fprintf(stderr, "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n"); |
60 | fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n"); | |
0bb187ca SH |
61 | fprintf(stderr, "Parameters:\n"); |
62 | fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n"); | |
63 | fprintf(stderr, "\t-c --count <count>\t" | |
64 | "Print <count> number of intervals\n"); | |
7e8bd80e | 65 | fprintf(stderr, "\t-d --dump\t\t" |
0bb187ca | 66 | "Dump list of available files/keys\n"); |
a4f9e8df SH |
67 | fprintf(stderr, "\t-j --json\t\t" |
68 | "Display in JSON format\n"); | |
0bb187ca SH |
69 | fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n"); |
70 | fprintf(stderr, "\t-h --help\t\tThis help message\n"); | |
71 | fprintf(stderr, "\t-i --interval <intv>\t" | |
72 | "Set interval to 'intv' seconds\n"); | |
73 | fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n"); | |
869fcabe PS |
74 | fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n"); |
75 | fprintf(stderr, "\t\t\t\t0 = never\n"); | |
76 | fprintf(stderr, "\t\t\t\t1 = once\n"); | |
77 | fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n"); | |
0bb187ca SH |
78 | fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n"); |
79 | fprintf(stderr, "\n"); | |
80 | ||
81 | exit(exit_code); | |
82 | } | |
83 | ||
84 | struct field_param { | |
85 | const char *name; | |
86 | struct lnstat_field *lf; | |
87 | struct { | |
88 | unsigned int width; | |
89 | } print; | |
90 | }; | |
91 | ||
92 | struct field_params { | |
93 | unsigned int num; | |
94 | struct field_param params[MAX_FIELDS]; | |
95 | }; | |
96 | ||
97 | static void print_line(FILE *of, const struct lnstat_file *lnstat_files, | |
98 | const struct field_params *fp) | |
99 | { | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < fp->num; i++) { | |
a4f9e8df | 103 | const struct lnstat_field *lf = fp->params[i].lf; |
0bb187ca | 104 | |
468dec75 | 105 | fprintf(of, "%*lu|", fp->params[i].print.width, lf->result); |
0bb187ca SH |
106 | } |
107 | fputc('\n', of); | |
108 | } | |
109 | ||
a4f9e8df SH |
110 | static void print_json(FILE *of, const struct lnstat_file *lnstat_files, |
111 | const struct field_params *fp) | |
112 | { | |
fcc16c22 | 113 | json_writer_t *jw = jsonw_new(of); |
a4f9e8df | 114 | int i; |
a4f9e8df | 115 | |
fcc16c22 | 116 | jsonw_start_object(jw); |
a4f9e8df SH |
117 | for (i = 0; i < fp->num; i++) { |
118 | const struct lnstat_field *lf = fp->params[i].lf; | |
3d0b7439 | 119 | |
fcc16c22 | 120 | jsonw_uint_field(jw, lf->name, lf->result); |
a4f9e8df | 121 | } |
fcc16c22 SH |
122 | jsonw_end_object(jw); |
123 | jsonw_destroy(&jw); | |
a4f9e8df SH |
124 | } |
125 | ||
0bb187ca SH |
126 | /* find lnstat_field according to user specification */ |
127 | static int map_field_params(struct lnstat_file *lnstat_files, | |
128 | struct field_params *fps, int interval) | |
129 | { | |
130 | int i, j = 0; | |
131 | struct lnstat_file *lf; | |
132 | ||
133 | /* no field specification on commandline, need to build default */ | |
134 | if (!fps->num) { | |
135 | for (lf = lnstat_files; lf; lf = lf->next) { | |
136 | for (i = 0; i < lf->num_fields; i++) { | |
137 | fps->params[j].lf = &lf->fields[i]; | |
138 | fps->params[j].lf->file->interval.tv_sec = | |
139 | interval; | |
140 | if (!fps->params[j].print.width) | |
ae665a52 | 141 | fps->params[j].print.width = |
0bb187ca | 142 | FIELD_WIDTH_DEFAULT; |
3d0b7439 | 143 | |
f309d0ae SH |
144 | if (++j >= MAX_FIELDS - 1) { |
145 | fprintf(stderr, | |
acd1e437 | 146 | "WARN: MAX_FIELDS (%d) reached, truncating number of keys\n", |
f309d0ae | 147 | MAX_FIELDS); |
f493dc30 | 148 | goto full; |
f309d0ae | 149 | } |
0bb187ca SH |
150 | } |
151 | } | |
acd1e437 | 152 | full: |
0bb187ca SH |
153 | fps->num = j; |
154 | return 1; | |
155 | } | |
156 | ||
157 | for (i = 0; i < fps->num; i++) { | |
158 | fps->params[i].lf = lnstat_find_field(lnstat_files, | |
159 | fps->params[i].name); | |
160 | if (!fps->params[i].lf) { | |
161 | fprintf(stderr, "Field `%s' unknown\n", | |
162 | fps->params[i].name); | |
163 | return 0; | |
164 | } | |
165 | fps->params[i].lf->file->interval.tv_sec = interval; | |
166 | if (!fps->params[i].print.width) | |
167 | fps->params[i].print.width = FIELD_WIDTH_DEFAULT; | |
168 | } | |
169 | return 1; | |
170 | } | |
171 | ||
172 | struct table_hdr { | |
173 | int num_lines; | |
174 | char *hdr[HDR_LINES]; | |
175 | }; | |
176 | ||
177 | static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files, | |
178 | struct field_params *fps, | |
179 | int linewidth) | |
180 | { | |
acd1e437 | 181 | int h, i; |
0bb187ca SH |
182 | static struct table_hdr th; |
183 | int ofs = 0; | |
184 | ||
f89bb021 PS |
185 | for (i = 0; i < HDR_LINES; i++) |
186 | th.hdr[i] = calloc(1, HDR_LINE_LENGTH); | |
0bb187ca SH |
187 | |
188 | for (i = 0; i < fps->num; i++) { | |
189 | char *cname, *fname = fps->params[i].lf->name; | |
0bb187ca SH |
190 | unsigned int width = fps->params[i].print.width; |
191 | ||
468dec75 | 192 | snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width, |
0bb187ca SH |
193 | fps->params[i].lf->file->basename); |
194 | ||
195 | cname = fname; | |
196 | for (h = 1; h < HDR_LINES; h++) { | |
197 | if (cname - fname >= strlen(fname)) | |
468dec75 SH |
198 | snprintf(th.hdr[h]+ofs, width+2, |
199 | "%*.*s|", width, width, ""); | |
0bb187ca SH |
200 | else { |
201 | th.num_lines = h+1; | |
468dec75 SH |
202 | snprintf(th.hdr[h]+ofs, width+2, |
203 | "%*.*s|", width, width, cname); | |
0bb187ca SH |
204 | } |
205 | cname += width; | |
206 | } | |
207 | ofs += width+1; | |
208 | } | |
209 | /* fill in spaces */ | |
210 | for (h = 1; h <= th.num_lines; h++) { | |
211 | for (i = 0; i < ofs; i++) { | |
212 | if (th.hdr[h][i] == '\0') | |
213 | th.hdr[h][i] = ' '; | |
214 | } | |
215 | } | |
216 | ||
217 | return &th; | |
218 | } | |
219 | ||
220 | static int print_hdr(FILE *of, struct table_hdr *th) | |
221 | { | |
222 | int i; | |
223 | ||
224 | for (i = 0; i < th->num_lines; i++) { | |
225 | fputs(th->hdr[i], of); | |
226 | fputc('\n', of); | |
227 | } | |
228 | return 0; | |
229 | } | |
ae665a52 | 230 | |
0bb187ca SH |
231 | |
232 | int main(int argc, char **argv) | |
233 | { | |
234 | struct lnstat_file *lnstat_files; | |
235 | const char *basename; | |
a4f9e8df | 236 | int i, c; |
0bb187ca SH |
237 | int interval = DEFAULT_INTERVAL; |
238 | int hdr = 2; | |
239 | enum { | |
240 | MODE_DUMP, | |
a4f9e8df | 241 | MODE_JSON, |
0bb187ca SH |
242 | MODE_NORMAL, |
243 | } mode = MODE_NORMAL; | |
e7e2913f | 244 | unsigned long count = 0; |
a4f9e8df | 245 | struct table_hdr *header; |
0bb187ca SH |
246 | static struct field_params fp; |
247 | int num_req_files = 0; | |
248 | char *req_files[LNSTAT_MAX_FILES]; | |
ae665a52 | 249 | |
0bb187ca SH |
250 | /* backwards compatibility mode for old tools */ |
251 | basename = strrchr(argv[0], '/'); | |
ae665a52 | 252 | if (basename) |
0bb187ca SH |
253 | basename += 1; /* name after slash */ |
254 | else | |
255 | basename = argv[0]; /* no slash */ | |
256 | ||
257 | if (!strcmp(basename, "rtstat")) { | |
258 | /* rtstat compatibility mode */ | |
259 | req_files[0] = "rt_cache"; | |
260 | num_req_files = 1; | |
261 | } else if (!strcmp(basename, "ctstat")) { | |
262 | /* ctstat compatibility mode */ | |
263 | req_files[0] = "ip_conntrack"; | |
264 | num_req_files = 1; | |
265 | } | |
266 | ||
acd1e437 | 267 | while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:", |
0bb187ca | 268 | opts, NULL)) != -1) { |
a4f9e8df | 269 | int len = 0; |
e796b958 SH |
270 | char *tmp, *tok; |
271 | ||
0bb187ca | 272 | switch (c) { |
a4f9e8df SH |
273 | case 'c': |
274 | count = strtoul(optarg, NULL, 0); | |
275 | break; | |
276 | case 'd': | |
277 | mode = MODE_DUMP; | |
278 | break; | |
279 | case 'j': | |
280 | mode = MODE_JSON; | |
281 | break; | |
282 | case 'f': | |
283 | req_files[num_req_files++] = strdup(optarg); | |
284 | break; | |
285 | case '?': | |
286 | case 'h': | |
287 | usage(argv[0], 0); | |
288 | break; | |
289 | case 'i': | |
290 | sscanf(optarg, "%u", &interval); | |
291 | break; | |
292 | case 'k': | |
293 | tmp = strdup(optarg); | |
294 | if (!tmp) | |
0bb187ca | 295 | break; |
a4f9e8df SH |
296 | for (tok = strtok(tmp, ","); |
297 | tok; | |
298 | tok = strtok(NULL, ",")) { | |
299 | if (fp.num >= MAX_FIELDS) { | |
3d0b7439 | 300 | fprintf(stderr, |
acd1e437 | 301 | "WARN: too many keys requested: (%d max)\n", |
a4f9e8df | 302 | MAX_FIELDS); |
0bb187ca | 303 | break; |
0bb187ca | 304 | } |
a4f9e8df SH |
305 | fp.params[fp.num++].name = tok; |
306 | } | |
307 | break; | |
308 | case 's': | |
309 | sscanf(optarg, "%u", &hdr); | |
310 | break; | |
311 | case 'w': | |
312 | tmp = strdup(optarg); | |
313 | if (!tmp) | |
0bb187ca | 314 | break; |
a4f9e8df SH |
315 | i = 0; |
316 | for (tok = strtok(tmp, ","); | |
317 | tok; | |
318 | tok = strtok(NULL, ",")) { | |
319 | len = strtoul(tok, NULL, 0); | |
320 | if (len > FIELD_WIDTH_MAX) | |
321 | len = FIELD_WIDTH_MAX; | |
322 | fp.params[i].print.width = len; | |
323 | i++; | |
324 | } | |
325 | if (i == 1) { | |
326 | for (i = 0; i < MAX_FIELDS; i++) | |
0bb187ca | 327 | fp.params[i].print.width = len; |
a4f9e8df SH |
328 | } |
329 | break; | |
330 | default: | |
331 | usage(argv[0], 1); | |
332 | break; | |
0bb187ca SH |
333 | } |
334 | } | |
335 | ||
336 | lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files, | |
337 | (const char **) req_files); | |
338 | ||
339 | switch (mode) { | |
0bb187ca | 340 | case MODE_DUMP: |
b1410e0a | 341 | lnstat_dump(stdout, lnstat_files); |
0bb187ca | 342 | break; |
0bb187ca | 343 | |
a4f9e8df SH |
344 | case MODE_NORMAL: |
345 | case MODE_JSON: | |
0bb187ca SH |
346 | if (!map_field_params(lnstat_files, &fp, interval)) |
347 | exit(1); | |
ae665a52 | 348 | |
0bb187ca SH |
349 | header = build_hdr_string(lnstat_files, &fp, 80); |
350 | if (!header) | |
351 | exit(1); | |
352 | ||
acd1e437 | 353 | if (interval < 1) |
a4f9e8df | 354 | interval = 1; |
0bb187ca | 355 | |
fdb347f7 | 356 | for (i = 0; i < count || !count; i++) { |
0bb187ca | 357 | lnstat_update(lnstat_files); |
a4f9e8df SH |
358 | if (mode == MODE_JSON) |
359 | print_json(stdout, lnstat_files, &fp); | |
360 | else { | |
fdb347f7 PS |
361 | if ((hdr > 1 && !(i % 20)) || |
362 | (hdr == 1 && i == 0)) | |
a4f9e8df SH |
363 | print_hdr(stdout, header); |
364 | print_line(stdout, lnstat_files, &fp); | |
365 | } | |
f50332c5 | 366 | fflush(stdout); |
e7e2913f | 367 | if (i < count - 1 || !count) |
a4f9e8df | 368 | sleep(interval); |
0bb187ca | 369 | } |
a4f9e8df | 370 | break; |
0bb187ca SH |
371 | } |
372 | ||
373 | return 1; | |
374 | } |